# Heat takes time

Two rectangular blocks, having identical dimensions can be arranged either in configuration 1 or configuration 2 as shown in the figure. one of the blocks has thermal conductivity $$\kappa$$ and other has $$2\kappa$$. the temperature difference between the ends along the $$x$$-axis is same in both the configurations.

It takes 9 seconds to transport a certain amount of heat from the hot end to the cold end in configuration 1. time to transport the same amount of heat in the configuration 2 is ?

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